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W65C02S6P-14 Datasheet(PDF) 17 Page - List of Unclassifed Manufacturers |
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W65C02S6P-14 Datasheet(HTML) 17 Page - List of Unclassifed Manufacturers |
17 / 40 page The Western Design Center, Inc. W65C02S Data Sheet The Western Design Center, Inc. W65C02S Data Sheet 17 4.4 Absolute Indexed with Y a, y With the Absolute Indexed with Y addressing mode, the Y Index Register is added to the second and third bytes of the instruction to form the 16-bit effective address. Byte: 2 1 0 Instruction: ADH ADL OpCode ADH ADL + Y Operand address: effective address 4.5 Absolute Indirect (a) With the Absolute Indirect addressing mode, the second and third bytes of the instruction form an address to a pointer. This address mode is only used with the JMP instruction and the Program Counter is loaded with the first and second bytes at this pointer. Byte: 2 1 0 Instruction: ADH ADL OpCode Indirect address: ADH ADL New PC value: indirect address 4.6 Accumulator A With Accumulator addressing the operand is implied as the Accumulator and therefore only a single byte forms the instruction.. Byte: 2 1 0 Instruction: OpCode Operand: accumulator 4.7 Immediate Addressing # With Immediate Addressing the operand is the second byte of the instruction. Byte: 2 1 0 Instruction: Operand OpCode Operand: Operand 4.8 Implied i Implied addressing uses a single byte instruction. The operand is implicitly defined by the instruction. Byte: 2 1 0 Instruction: OpCode Operand address: implied |
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